Camera attachment.



E. L. HALL.

CAMERA ATTACHMENT.

APPLICATION FILED APR. 27, 1907.

906,222. Patented Dec. 8,1908.

2 SHEETSSHBET 1.

Inn-DIT- I: 18 s i: E ish 5 i him; 6 i3 3 11 I i:

I I l l 17 I i! i 5w? i g'iii :1 INVENTOR w T E55 ,5; EdmnZZamZerlaZl E. L. HALL.

CAMERA ATTACHMENT.

. APPIIIGATION FILED APR.27, 1907. Patented Dec- 2 SHEETSSHEET 2.

W/ TNE SSE S ATTORNEYS- EDWARD L. HALL, or New YORK, N. Y.

cnraaa arra'omnr.

v No. 906, 222.

Specification Letters Patent.

' Patented Doc. 8, 1908.

Application filed April 27, I907.- Serial No. 3-70,$1.

To all whom it may concern:

Be it known that. I, EDWARD LANDER HALL, a citizen of theUnited States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York,

with an adjustable hood that is applicable to another form of camera, carryi any type of camera and which can be expeditiously andconveniently fitted thereto, and which is also capable of being readily removed.

- It is also the purpose of the invention to so construct and apply the finder attach ment, that the bellows of the hood will be automatically raised and lowered as the photographic lens is adjusted to obtain a focus, the image a peering upon the round glass as clearly an under similar con itions, as it would be projected upon the plate to be exposed. i

It is also a purpose of the invention to provide a finder of the character described that will be not only simple, durable and, economic iii-construction, but which will also be accurate and reliable in operation.

The invention consists in the'novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had. to the accompanying drawings formin a partof this specifif cation, in'which simi ar characters of refer? ence indicatecorresponding parts in all the Figurejl is a sectional side elevation of the improved finder attachment, and a section through-theportions of the frontdro board of a camera to which it is applied; ig. 2 is a horizontal section taken l practically on the line 2-2 of Fig. 1;, is a side elevation of a portion of the ocu'sing board of graphic lens and a portion of t .e attached bellows, a portion of the front drop board being shown in section, and the said view which-is drawn upon asmaller scale, also illustrates the im rove'd finder attachment as applied to the vocusing board; Fig. 4 is a side elevation of abox camera drawn 11. on areduccd S ale, parts thereof being bro en away to illustrate the adaptation of the finder attachment thereto; and Fig. 5 is an the photoenlarged side elevation of a drop board camera, and a slightly modified form of the finder attachment applied to the box body of the camera.

A representsthe front drop board of a camera box upon which the front or focusing board A has movement, which board A carries the photographic lens A and is attached to the forward portion of the camera bellows A being likewise provided with the customary rack 10 mounted to slide upon the front drop board A. 7

The finder B consists of a box body 11, which ma be secured to the upper face of the front rop board A in any suitable 0r approved manner.

In the drawings .the box body '11 of the finder is shown provided with a slotted lip 14, extending from its rear surface to an en gag ment with a pin 15 secu ed to the said drop board,- while .a corresponding lip 16 located at the front of the box body 11 of the finder is provided with a set screw 17, that enters a suitablethreaded socket in the aforsaiddrop board, as is shown in Fig. 1, and the body 11 of the finder is provided with the customary front lens 13.

A skeleton rectangular frame 18 is shown as loosely surrounding the box body 11 of the finder, and the side portions of this frame are provided with inwardly extending lugs or cars 19, and guide rods 20 are attached to these ears, which guide rods extend down into sockets 21 secured to the side faces of 'bo bo y of the fin e as s l us rated Fig- .1, and each sid bar of the frame 18 is provided with a longitudinal slot 22 ateach of its ends, the said frame 18 being vertically movable around the body of the finder. .A shaft 23 extends through the body of the finder below the mirror 12 therein, which mirror has the customary angle of 45 and reflects the image produced thereon by a lens 13. The shaft 23 is journaled in the sides of the body 11 of the finder, and is provided at one end with a pinion 24 that en ages with the rack 10 and at its opposite end the shaft is provided with a disk 25. A link 26 isconnected with the pinion 24: by means of a suitable wrist pin, and with the inner portion of the side memher ot the frame 18,whi1e the co espondin link 27 is connected n the same manner wit. the disk 25 and with the opposing .side member of the frame 18.

The lower end of a bellows 28 is secured to the upper portion of the body 11 of the per frame 30; these lazy tongs are at oppo site sides of the'bellows 28 and their lower ends 34 are connected by means of pins with the frame 18, the pins passing through the slots 22 in the side bars of the said frame.

A spring is connected with the lower members of each lazy tong, as is shown in Figs. 1 and 2, and these springs serve to draw the lower ends of the lazy tongs to- 'gether and thus force the said lazy tongs upward whenv the bellows 28 is released from any device that may be employed to hold it in a folded position.

As the lens board A is carried outward or inward to obtain the proper focus, the rack 10 engaging with the teeth of the pinion 24 will cause thebell'ows 28 to be raised or lowered, drawing upon the reserve folds 29 at such time, and when the proper'focus has been obtained, it will be found that the image is simultaneously focused. on the ground glass, thusthe focusing of the image :on-thegroundglass is automatically and simultaneously obtainedwith the proper focus of the lens A relatively to the plate to be exposed, andv under all conditions of use when the'finder has been properly set the same conditions will prevail.

While not absolutely essential to the op- I eration of the device, the lens 13 should be of the same focal length as the lens A In-Fig. 3 of the drawings, I have illustrated the finder box B as attached to the upperedge of the focusing board A for" the camera. The finder box B is of the same construction as that which has been descr bed, except that the shaft 23and accompanyingparts are omitted. -A bellows 36 corresponding to the bellows 28 is attached tothe]uppe r portion of the finder box B, being provided atits lower portion with reserve folds 37, and a frame 38 is attached to'the upper end of-the bellows 36, in which frame the ground on focusing glass is mounted, and at 'the upper end portion of thesaid" bellows the sight hood C is placed. A frame 39 practically corresponding to the frame 18 is mounted to'slideabove the finder box B, and thisframe 39f'isfprovided at its sides with downwardly extending guide rods 40 thatmove in guide sockets 41 secured to thefinder B, and flexible connections 43 are provided between the frame 39 and the upper frame 38 and one o'r morev movement in a lug 46 located at the side 0 bellows is entirely collapsed, it may be held 7 in such condition by engagin spring keepers 44 carried by the finder B r A rod 45 is pivotally attached to a side of the frame 39, the said rod having slidi the finder and a lug 47 located at the rear of the focusing board A, and a link 48 pivotally connects the lower end of the rod45 with a rearward extension 49 frofn the pinion 50, which pinion is mounted to turn on suitable bearings carried by a foot piece 51 of the lens board A, which foot piece travels in the customary guides 52 carried by. the

front drop board A. The foot piece 51 of the focusing board A is held in adjusted position by means of the usual clamp 53. In this instance the teeth of the pinion 50 engage with the teeth offa rack 50 that is secured to the upper face of the front drop board A. Two plunger bars 45 and connect- 9 -ing links 48 may be employed if desired, but

one has been found to be suflicient.

In the o eration of this form of the device, when the ellows 36 is released, the spring 42 acts to open the bellows to a limited extent, then as the lens A of the camera ismoved in or out to obtain the proper focus relatively to the plate to be exposed, the bellows 36 of the finder is moved up or down automatically through the mechanism described, to such an extent as to obtain a'cor respondingly accurate focus on the focusing or ground glass plate in the finder bellows.

In Fig. 4 I have illustrated the adaptation of the finder to what is known as a box camera D. The finder B is located within said box camera, havin been introduced through an opening 54 in t e top, and the lens 13 of the finder is opposite the, opening'55 in the front of the box D, as is customary. The finder B is provided with the same form of bellows and hood asis shown in Fig. 3, and

. the said parts are designated by correspond- ;ing reference numerals, but instead of em-% ploying the' operating rod 45 and accompanying link 48, a sliding rod 56 is attached to the frame 39,, the said sliding rod 56, has guided movement at the inner side face of the camerabox, as is shown in dotted lines in Fig. 4, and a cable 57 is attached to the lower end of the sliding rod 56, the said cable 57 being passedover a guide pulley 57' that is suitably mounted on the same side of the camera box at which the rod or bar 56 has movement, and the said cable 57 is at- 61 connected with the focusing board A, as is frame 69 are provided with longitudinal W- I f shown also in dottedlines in Fig. 4;, so that 1 after the finder hasbeen properly attached, as the shaft 58 is. turned to effect a proper focusing of the camera, a correspondinglyaccurate focusis automatically obtained at the focusing plate of the bellows '36.

In- Fig. 5 I have illustrated another slight modification of the device, wherein it is shown attached to the upper face-of the box body D of a camera having a front drop board A; In this type of camera the lens board A is provided with a housing63 that extends to the rear over the front drop board A and over a rack 62, both of which are attached to the lens board A and move with said board. The adjustment of the lens boardA' is effected through the medium of a shaft 64 which corresponds to the shaft 58 above mentioned, and this shaft 64 is also provided with a knob 65 at its outer end whereby to turn the same and cause a pinion 66 carried by the said shaft and which engages with the rack 62 to move the lens board A inward or outward.

The box body of the finder B is provided also with a bellows 67, having reserve folds 68 at its lower end, and a frame 69 at its upper end in which the ground glass or focusing plate is located, and a sight hood C above the frame 69. The side pieces of the slots.;7() near each of its ends, and a rectangular frame 71 is mounted to slide at the lower' portion of the said bellows, and the side members of this lower or sliding frame 71 is provided with longitudinal slots 72, that correspond to the slots above named.

Cross and 'pivotally connected links 74; are locatedat the opposite sides of the bellows, and pins75 at the upper ends of these links are made to travel in the slots 70 of the upper frame 69, and pins 76 at the lower endsof the links 74 travel in the slots 72 on the lower or sliding frame 71, and a spring 77 connects the lower arts of the links 7 4, whereby when the be lows 67 is released from whatever retainin device there may be employed, automatica ly and immediately the bellows is forced upward a redeter-' mined distance. The other and nal ad: just-ments to the bellows, being accomplished through the medium of the focusing mechan ism of the camera in substantially the following manner. Guide rods 78 are secured to the side members of the sliding frame 71, and these rods move in guide sockets 79 secured to the corresponding sides of the body of the finder B thefinder B also being attached to the box body B of the camera in any suitable. or approved way, as, for example, in the manner described with referenceto the construction shown in Fig. 1, the locking of the finder in position being effected by passinga'set screw 81 through a foot extending from a side of the finder.

A spring 82 is attached to'a horizontal linkv 83 and to the finder exerting downward sion-on the link. The link 83 is just below a side member of the slid frame 71, and at what maybe termed the rear end of the link 83 two short links 84 and 85 are pivotally connected, pointing toward -the front but extending in op osite directions oneupward and the other being pivotally attached to the finder B and the upper short-link 85 being pivotally attached to the inner face of the adjacent side member of the sliding frame 71. The line 83 is actually a connecting bar for two sets of links, namely the rear set 84 and 85 and a correspondin forward set 84 and- 85, the forward set acing in the same direction as the rear set, and the forward set of links are pivotally connected to the forward end of the connecting bar 83, the outer end of theforward link 85 being attached to the same member of the frame 71 as the corresponding link 85, while the outer'end of the lower link 84; is pivotally attached to the finder B A cable 86 is secured at one of its ends to the shaft 64, and this cable ex'-. tends upward and is assed over a guide roller 87 that is at the orward end of a forwardly extending arm 88 secured to the finder B In the operation of this form of the device, the first automatic adjustment of the hood having been obtained, as the focusing mechanism of the camera is operated to obtain the proper focal relation between the lens A and the plate to be exposed, the hood 67 will be automatically raised or lowered, so

ownward, the :short link 84 construction of the device, other means may.

- be employed for extending the hood of the finder at its initial movement than the means shown; that is to say, any equivalents thereof of the focusing mechanism of the camera with the focuslng mechanism of the finder,

to brin the two said mechanisms simultaneously in the same focal relation relatively to the hotographic lens and the plate to beexposed Having thus described my invention, I claim as new. and desire to secure by Letters Patent,----

1. In cameras, a finder, a bellows connected with the finder, a focusing lass at the upper portion of the bellows, 12.11 a hood of. the focusing camera box and the focusing mechanism for 1 the camera, of a finder supported on-the box,

a' 'bellows secured to the said finder, a hood for the bellows, a focusing plate intervening the hood and the bellows, devices for automatically-opening the bellows a limited distance, the bellows being rovided with res'erve folds when so opene andmeans operate d by-the focusing mechanism of the camera, for further adjusting the focusing plate of the finder to or fromt'he same, whereby to obtain the same focal relation -'between the lens of the finder and .its focusplate as between the lens ofthe camera and-the plate to be exposed. 1 A C 255-, 3. In a camera, the combination with the body: of the camera and itsfocusingmechaiiism, of. a finder carried by the camera Y box'g a ,bellowss'ecuredto the said" finder extendingnpwardly -therefrom, having a series of reserve folds adjacent the finder, a focusplateat' the upper portion'of the said he lows, and a hoodabove the focusing plate,

expanding devicesjor the bellows, operating thereon to alimited extent, means for rais- 85; ingland' lowering the focusing plate, bring- "ing' into action t e reserve folds, and an operating device for the said means in operative connectionwith the focusing mechan- ,ism of the camera, whereby as the lens of 40 thecamera is moved outward or inward the bellows of the focusing, plate will be moved upward or downward, the extent of the movement of the fo'cusingplate corresponding-to the extentofthe movement of the $5. lens of thecamera, in that the same focal relation will be automatically obtained between the lens of the camera and the plate to be exposed, as betweenj-the'lens of the finder and its focusing plate. 7 4. In a camera, the combination with a camera box and the focusing mechanism for the camera, of a finder supported on the I box, a vertically disposed bellows secured to said finder, a hood for the bellows, a focusing plate intervening between the hoodand 68 the bellows, devices for automatically opening the bellows a limited distance, reserve folds for the bellows adapted for operation in the final adjustmentof the bellows, and

.means operated by'the focusing mechanism of the camera for the final adjustment of the focusing plate of the finder to or, from the a same, whereby to obtain thesame focal relation between the lens of the finder and its focusing plate, as between, the lens of the camera and the plate to be exposed.

' 5. In a camera, the-combination with a movable camera lens, of a finder having a finder lens, a reflecting mirror and a ground glass, the sa'id'reflecting mirror and ground glass having movementtow'ards and from 1 each other, and ata right angle relative to the movement of the saldcamera lens. 6. Ina camera, the combination with a :camera lens and the operating mechanism for movin the same towardand from the ---sensitive p ate or film,;o'f a finder-lens, re-.,

fleeting mirror, ground glass, andmeans for moving the ground glass relativeto'the said mirror, the said means being connected'with so the said operatin mechanism 'to beactuated' by the latter. an v to adjust the focal j TrQlation between the mirror amtgroandf lies in? l camera lens,the movement of the said groiind mental extension of the bellqyvs by the said reserve folds.

:In testimony whereof Ihavesigned name to this specification in the presencev of two subscribing witnesses. D

EDWARD n, Witnesses: Q J.FRED Aoxnn,

Jorm P. DAVIS. 

